Improvement in barrel-arbors for watches



1. B. HOPKINS. Barrel-Arbor for Watches.

N0. I65,83l, Patentedlu|y20,l875.

ll m \\\\\\\\\\\\\\\\\\\"lllll|l|||ll Illlllllllllllilll WITNESS@ l I INJENTUPK- .Pm. PHOTO`LH'NOGMFMER, WASHINGTON, Dv C.

UNITED STATES PATENT QEEICEC JASON It. HOPKINS, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOB OF ONE-HALF HIS RIGHT TO WM. D. COLT, OF SAME PLACE.

IMPROVEMENT IN BARREL-ARBORS FOR WATCHES.l

Specification forming part of Letters Patent No. 165,831, dated July 20, 1875 application led J une 9, 1875.

To all whom t man; concern:

Be it known that I, JASON It. HOPKINS, ot'

IVashington, in the county of Washington and in the District of Columbia, have invented certain new and uset'ul Improvements in lli/latches; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing, making a part of this specification, in which- Figure l is a perspective view of my windingbarrel and hollow winding-arbor detached from the movement and separated from each other, and Fig. 2 is a vertical central section ot' said parts, combined with each other and with the movement. y

Letters ot' like name and kind refer to like parts in each oi' the tigures.

The design oi" my invention is to increase the etliciency and durability of a watch-movement; and it consists in a going-barrel attached to or upon a staff which works in a hollow7 winding-arbor and has its principal bearing in the same, substantially as and for the purpose hereinafter specified.

In the annexed drawing, A represents the going-barrel of my watch, constructed in the usual manner, and provided with a central staffer arbor, B, that is rigidly secured to or within the same; A cover or head, A', is litted to and secured within the open side ot' said barrel, but at its center does not come into contact with said arbor, its central opening a being considerably larger than the same. As seen in Fig. 2, one end of the arbor B is squared, (for reasons hereinafter given,) while its opposite end terminates in a point, b, and over said end is fitted a hollow arbor, C, that at its lower end is provided with a collet, c, for the attachn'ient of the inner end of awatch-spring, D. The opening within said arbor has a depth slightly less than the length ofthe portion of said staff which Fits therein, and at its end is made concave to correspond to the conveXity ot' the end ot' the latter. The barrel described is pivoted within the front watchplate E by means of' that portion of its statt' B opposite to the arbor O, while the latter is journaled near its outer end within a bridge, F, that is attached to and extents inward from the back plate G. A ratcl1et\\'heel, c, is attached to said arbor `just beneath said bridge, and is engaged by aspring-pawl which prevents motion in one direction, while permitting said arbor to rotate freely in an opposite direction.

As thus ar anged, it will be seen that by rotating the arbor C in the direction permitted by the ratchet and pawl the spring D will be wound up and the barrel caused to rotate in the same direction, but that said barrel, instead ot` revolving upon the winding-arbor, as is usually the case, revolves with the statt' B, which, being' journaled within the plate E and said arbor C, has such length of bearings as to give great durability, while, in con. sequence oi" the distance between said bearings, said statt possesses a degree of steadiness that could not be had with a stattet ordinary length.

Having thus fully set forth the nature and merits ot' my invention, what I claim as new 1s A going-barrel attached to or upon a stai't which works in a hollow winding-arbor, and has its principal bearing in the same, substantially as and for the purpose specitied.

In testimony that I claim the tbrcgoing I have hereunto set my hand this 7th day of June, 1875.

JASON It. HOPKINS.

Witnesses:

GEO. S. PRTNDLE, WILLIAM FITCH. 

